What you need to know about XKeyscore and the other NSA leaks

From left, Deputy Attorney General James Cole; National Security Agency Deputy Director John C. Inglis; Robert Litt, general counsel in the Office of Director of National Intelligence; and Sean Joyce, deputy director of the FBI, wait to testify on Capitol Hill in Washington, Wednesday, July 31, 2013, as the Senate Judiciary Committee, questions them about the NSA's surveillance programs for the first time since the House narrowly rejected a proposal last week to effectively shut down the NSA's secret collection of hundreds of millions of Americans' phone records. (AP Photo/J. Scott Applewhite)